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Step 2The motor mounts
This step involves making the mounting brackets for the motor, this is probably the most crucial step and also the longest, not because of the fabrication (takes bout 30mins) but the thinking and fiddling around. This took me about about an afternoon and night wondering whether I needed more or less or stronger supports. I then just came up with a 2 support plan and stuck with.
it basically would hold the motor by the 2 bolts that also held the clutch on and in its previous life (as a functional whipper snipper, the wire stand). I forgot to take a photo but its pretty simple.
Threes so many different bike shapes and motor mounting designs, so I'm not going to tell you how to do yours, (unless yours is same as mine) so you'll have to figure out the shape and/or mounting style for your bike/motor.
when you have your motor mounts ready to be fixed to your bike. you should just "tack weld" them on first because you will probably have to adjust them as you want a fair amount of pressure from the drive shaft onto the wheel but not too much that it hard to turn.
it basically would hold the motor by the 2 bolts that also held the clutch on and in its previous life (as a functional whipper snipper, the wire stand). I forgot to take a photo but its pretty simple.
Threes so many different bike shapes and motor mounting designs, so I'm not going to tell you how to do yours, (unless yours is same as mine) so you'll have to figure out the shape and/or mounting style for your bike/motor.
when you have your motor mounts ready to be fixed to your bike. you should just "tack weld" them on first because you will probably have to adjust them as you want a fair amount of pressure from the drive shaft onto the wheel but not too much that it hard to turn.
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I'm not knocking your idea at all, in fact I like it very much, I'm just hashing it out. So... My understanding of bike gearing is basic, but it seems that if the chain traveled under the rear sprocket and then straight up to the engine, there might not be enough chain contact with the rear sprocket. Hmm...
Also, if the chain traveling at a down angle, from the engine to the front derailleur, it might interfere with the front derailleur operation.
But I suppose the motor could be mounted inside the frame instead of over the back tire... I guess that's what motorcycles do... Wow... this changes everything in my plan! Great suggestion!
I did think of cutting a slot in one of the mounts, however if you look at a close up of the clutch bolted to the mounts, you will notice the that there is a very small flat circle that the bolt can fit on and around that is sloped, and if you slide the clutch through the slot it fouls on the slope.
You would have to make an adapter for the clutch that would allow it to slide, or build a clutch housing, or you just get a motor that will fit right.
Cheers
it does look like alot of work but really theres not much. you could easly make yours ajustable. in your image you have drawn the left one could have a bolt at the join and remove the other one and put a thread in.